This crossing is definitely a manually controlled (full) barrier crossing (MCB) remotely monitored by CCTV type crossing (normally only referenced as a CCTV crossing).
As Lurcheroo describes, the crossing is normally open to road users. When the signaller has a train that requires to use the line through the crossing, when the train is approaching (and this could be more than a couple of miles away), the signaller will operate the control that brings the CCTV camera picture up on the monitor, they check that there is no obstruction, then operate the close crossing sequence control. The amber lights will illuminate, then the alternating flashing red lights, then the ‘leading’ ‘entry’ barriers, then the ‘exit’ barriers. The signaller then checks the crossing is clear, then operates the ‘crossing clear’ button. Only now can the protecting signal(s) be cleared. Also note that on most crossings, all four barriers have to be electrically proved down, and a minimum number of red lights have to be working (lighting up) for the circuitry to allow the protecting signal to clear to a proceed aspect.
If the train is not due to pass over the crossing, obviously none of the above happens, as the train driver is expected to stop their train at or short of the protecting signal.
With most crossings of this type, if a train passes the protecting signal, regardless of it’s state, the train detection system (track circuit, axle counter, treadle) will automatically cause the alternating flashing red lights to come on. The barriers will not automatically lower.
If the protecting signal is close to the crossing, this automatic activation of the red road lights will not give very much warning time before the train appears on the crossing, unless the train is moving slowly.
At any time, the signaller can start the barrier lower sequence to lower the barriers.
Unless otherwise specified, it’s not normally a requirement for TPWS to be provided at a signal that protects a level crossing which is on plain line.